When was Wagner at his most suicidal?

I vote for the period between 1863 and pre-Ludwig 1864. Almost 4
revolutionary works completed (Rheingold, Walkuere, Siegfried* and
Tristan und Isolde -without counting major changes to Tannhaeuser-)
having had the chance to premiere none of them. 14 years without
premiering any work (Lohengrin 1850) and 19 since he was present at
the opening night for a new work (Tannhaeuser in 1845).
Also, Minna was dead by then and the whole Wesendonck affair had
brought only disappointment. On top of that, he had nowhere he could
call home being a bit of a Wanderer himself.
What do you think?